Honors Physics Forces Practice

The unit Newton is equivalent to:

• kg * m/s²

• kg * m/s

• kg * m²/s²

• kg * m²/s

A 12 N net force is applied to a 3 kg object that starts at rest. How fast is the object moving after 2 seconds?

• 2 m/s²

• 8 m/s²

• 18 m/s²

• 72 m/s²

An astronaut on the Moon has . . .

I - Less mass

II - Less inertia

III - Less weight

. . . than he does on Earth.

Which of the following statements are correct?

• I only

• I and II

• III only

• I, II, and III

Tags

NGSS.HS-PS2-4

The coefficient of kinetic friction is used to calculate the frictional force in which of the following scenarios?

I -- An object slides across the floor with a constant velocity

II -- An object slides across the floor with constant acceleration

III - An object sits at rest on a surface

• I only

• II only

• I and III

• I and II

A 20-ton truck collides with a small car. During the collision . . .

• the truck's velocity remains constant

• the force on the truck is less than the force on the car

• the force on the truck is greater than the force on the car

• the force on the truck is equal to the force on the car

Two boxes sit side-by-side on a frictionless surface. The masses of the two boxes are m1 = 4 kg and m2 = 2 kg. An external force of 12 N is applied to the boxes as shown. What is the acceleration of the two-box system?

• 6 m/s²

• 2 m/s²

• 3 m/s²

• 1.5 m/s²

Two boxes sit side-by-side on a frictionless surface. The masses of the two boxes are m1 = 4 kg and m2 = 2 kg. An external force of 12 N is applied to the boxes as shown.

Calculate the magnitude of the force that mass 2 exerts on mass 1.

• 24 N

• 12 N

• 8 N

• 4 N

A ball of mass m is suspended from two strings of unequal lenght as shown above. The magnitude of the tensions T1 and T2 in the strings must satisfy which of the following relations?

• T1 = T2

• T1 > T2

• T1 < T2

• T1 + T2 = m*g

• T1 - T2 = m*g

A 2-kg block slides down a 30 degree incline as shown in the picture. The acceleration of the block is 2 m/s². Which of the following FBDs best represents the forces acting on the block?

• 
• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

A block of weight W is pulled along a horizontal surface at constant speed v by a force F, which acts at an angle of theta with the horizontal, as shown in the picture. The normal force exerted on the block by the surface has a magnitude of:

• W ‑ F*cos(theta)

• W - F*sin(theta)

• W

• W + F*cos(theta)

• W + F*sin(theta)